|Persisting Table Data to GemFire XD Disk Stores / Overview of Disk Stores|
GemFire XD persists data on disk stores in synchronous or asynchronous mode.
In synchronous mode, GemFire XD writes each DML operation to the OS buffer as part of the statement execution. This mode provides greater reliability than asynchronous mode, but with lower performance.
QUEUESIZE sets the number of affected rows that can be asynchronously queued. After this number of pending rows are queued, operations begin blocking until some of the modified, created, or deleted rows are flushed to disk.
TIMEINTERVAL sets the number of milliseconds that can elapse before queued data is flushed to disk.
See CREATE DISKSTORE
Always use the shutdown-all command to gracefully shut down a cluster. This allows each member to reach a consistent replication state and record that state with other replicas in the cluster. When you restart peers after a graceful shutdown, each member can recover in parallel without waiting for others to provide consistent replication data.